emulator: GSplus
type: standalone
core_classification: community_fork
source: "https://github.com/digarok/gsplus"
upstream: "https://kegs.sourceforge.net/"
profiled_date: "2026-03-29"
core_version: "KEGS 1.38"
display_name: "Apple - Apple IIGS (GSplus)"
cores:
  - gsplus
systems:
  - apple-iigs
  - apple-iie

notes: |
  Fork of KEGS (Kent's Emulated GS) by digarok. Cross-platform Apple IIGS
  emulator supporting ROM 01 (128K), ROM 03 (256K), and Apple //e (32K) ROMs.
  ROM version determined by file size at load time.

  Batocera configgen (gsplusGenerator.py) sets g_cfg_rom_path to bios/ROM.03
  by default (configurable via gsplus_bios_filename system setting).

  Built-in Disk II controller PROM derived via XOR diffs from main ROM.
  Built-in HD SmartPort PROM (slot 7) hardcoded in source.
  Built-in character font (kegsfont.h), optional ROMX-compatible charrom
  loadable via config UI.

files:
  - name: ROM
    aliases: [ROM.01, ROM.03, APPLE2GS.ROM, APPLE2GS.ROM2, xgs.rom, XGS.ROM, Rom03gd, 342-0077-b]
    required: true
    description: "Apple IIGS system ROM"
    source_ref: "config.c:131,403-406,1092-1149"
    note: "Accepted sizes: 32768 (Apple //e), 131072 (ROM 01), 262144 (ROM 03)"
    validation: [size]

  - name: c600.rom
    aliases: [controller.rom, disk.rom, DISK.ROM, diskII.prom]
    required: false
    hle_fallback: true
    size: 256
    description: "Disk II controller PROM (slot 6)"
    validation: [size]
    source_ref: "config.c:414-415,1168-1220"
    note: "Built-in PROM generated from XOR diffs against main ROM"